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Finding the Fourth Proportional to 1,383,499, 1,909,257.78 and 779,887

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Solution

The fourth proportional to 1,383,499, 1,909,257.78 and 779,887 is: 1,076,260.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,499 : 1,909,257.78 = 779,887 : x
  2. Step 2: Convert to fraction form
    1,383,499/1,909,257.78 = 779,887/x
  3. Step 3: Cross multiply
    1,383,499x = 1,909,257.78 × 779,887
  4. Step 4: Simplify right side
    1,383,499x = 1,489,005,322,270.86
  5. Step 5: Solve for x
    x = 1,489,005,322,270.86/1,383,499
  6. Step 6: Final answer
    x = 1,076,260.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.